Removable Battery Pack Comprising at least one Switching Element for Interrupting or Enabling a Charging or Discharging Current

Abstract

A removable battery pack includes a monitoring unit, an electromechanical interface, and at least one first switching element. The electromechanical interface includes a plurality of electrical contacts. A first electrical contact is configured to serve as a first power supply contact, to which a first reference potential is applied, and a second electrical contact is configured to serve as a second power supply contact, to which a second reference potential is applied. The at least one first switching element is configured to interrupt or enable a charging or discharging current across the first power supply contact and the second power supply contact. The monitoring unit is configured to control the at least one first switching element based on a switching potential. The switching potential is directly derived from the first reference potential. The switching potential is decoupled with respect to voltage fluctuations and voltage drops of the first reference potential.

1 . A removable battery pack comprising:
 a monitoring unit;   an electromechanical interface including a plurality of electrical contacts, a first electrical contact configured to serve as a first power supply contact, to which a first reference potential is applied, and a second electrical contact configured to serve as a second power supply contact, to which a second reference potential is applied; and   at least one first switching element configured to interrupt or enable a charging or discharging current across the first power supply contact and the second power supply,   wherein the monitoring unit is configured to control the at least one first switching element based on a switching potential,   wherein the switching potential is directly derived from the first reference potential, and   wherein the switching potential is decoupled with respect to voltage fluctuations and voltage drops of the first reference potential.   
     
     
         2 . The removable battery pack according to  claim 1 , in wherein:
 the switching potential is formed by a resistor-capacitor element (RC element),   the RC element consists of at least one resistor and at least one capacitor,   the RC element is switched between the first reference potential and the second reference potential, and   the switching potential is applied between the at least one resistor and the at least one capacitor of the RC element.   
     
     
         3 . The removable battery pack according to  claim 2 , wherein the RC element is decoupled from the first reference potential by a protective diode. 
     
     
         4 . The removable battery pack according to  claim 2 , wherein the at least one resistor of the RC element has dimensions such that a its resistance value of the at least one resistor does not result in any heat generation that is hazardous for the removable battery pack. 
     
     
         5 . The removable battery pack according to  claim 4 , wherein the resistance value of the at least one resistor is at least 1 kΩ. 
     
     
         6 . The removable battery pack according to  claim 2 , wherein the at least one capacitor of the RC element has dimensions such that a capacitance of the at least one capacitor is larger than a sum of all capacitances of the removable battery pack that are loaded upon energization of the at least one first switching element. 
     
     
         7 . The removable battery pack according to  claim 2 , wherein the RC element has dimensions such that a time constant resulting from a product of a resistance value of the at least one resistor and a capacitance of the at least one capacitor does not cause loading times of the at least one capacitator that are unfavorably high for operation of the removable battery pack. 
     
     
         8 . The removable battery pack according to  claim 2 , wherein the switching potential is applied to a control input of the at least one first switching element using a half-bridge consisting of two further switching elements. 
     
     
         9 . The removable battery pack according to  claim 8 , wherein at least a second resistor and a third resistor are switched between (i) a tap of the RC element for the switching potential and the half-bridge, and/or (ii) a center tap of the half-bridge and the control input of the first switching element. 
     
     
         10 . The removable battery pack according to  claim 9 , wherein the second resistor and/or the third resistor have dimensions such that, due to a resulting resistance value of the second resistor and the third resistor, a switching current required for a rapid switching of the first switching element is not too low, and, in the event of a short-circuit, there is no heat generation that is hazardous for the removable battery pack. 
     
     
         11 . The removable battery pack according to  claim 10 , wherein the resulting resistance value of the second resistor and the third resistor is significantly less than 1 kΩ.